Apparently, waiting until the last minute is not something Android devs know how to do. They like to get their homework done early. The Samsung Galaxy S III is supposedly already rooted, before it even launches. A dev named Chainfire just posted information on how he and his team achieved root on the Galaxy S III by working through a leaked insecure kernel code. Feel free to hit up the source link for more details.
Man you guys are fast!
Source: XDA